Two years ago, we bought two new Trek bikes. We used them throughout the summer and fall. This was all on city streets and / or parks, so no off-roading.
Last year, due to an injury, we didn't ride our bikes at all, so they've pretty much been sitting in the garage for about a year and a half without any use.
Obviously, the tires are flat, which brings me to my question. Do you think they are safe to use if we just fill them up? I'm thinking they probably need to be changed since they haven't been used for so long, but neither one of us are big bike riders with any type of experience.